Revert "Extract CallStructure from Selector."

pkg/compiler/lib/src/util/util.dart

Index: pkg/compiler/lib/src/util/util.dart
diff --git a/pkg/compiler/lib/src/util/util.dart b/pkg/compiler/lib/src/util/util.dart
index b825d186725e2571d67cd2c1b853f17df4becd2f..7c75819b0fce6878963aae11408dd79cad85ea41 100644
--- a/pkg/compiler/lib/src/util/util.dart
+++ b/pkg/compiler/lib/src/util/util.dart
@@ -18,23 +18,6 @@ part 'link.dart';
 /// Smi range.
 const int SMI_MASK = 0x3fffffff;
 
-/// Mix the bits of [value] and merge them with [existing].
-int mixHashCodeBits(int existing, int value) {
-  // Spread the bits of value. Try to stay in the 30-bit range to
-  // avoid overflowing into a more expensive integer representation.
-  int h = value & 0x1fffffff;
-  h += ((h & 0x3fff) << 15) ^ 0x1fffcd7d;
-  h ^= (h >> 10);
-  h += ((h & 0x3ffffff) << 3);
-  h ^= (h >> 6);
-  h += ((h & 0x7ffffff) << 2) + ((h & 0x7fff) << 14);
-  h ^= (h >> 16);
-  // Combine the two hash values.
-  int high = existing >> 15;
-  int low = existing & 0x7fff;
-  return ((high * 13) ^ (low * 997) ^ h) & SMI_MASK;
-}
-
 /**
  * Tagging interface for classes from which source spans can be generated.
  */